Modoc County, California · Frost dates
Modoc County frost dates.
First-frost, last-frost, and growing-season length for Modoc County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 06-24
- 20%
- 06-17
- 50%
- 06-03
- 80%
- 05-20
- 90%
- 05-14
First fall frost
- 10%
- 08-27
- 20%
- 09-02
- 50%
- 09-12
- 80%
- 09-21
- 90%
- 09-27
28°F — killing freeze
Last spring freeze
- 10%
- 06-03
- 20%
- 05-24
- 50%
- 05-11
- 80%
- 04-30
- 90%
- 04-25
First fall freeze
- 10%
- 09-10
- 20%
- 09-14
- 50%
- 09-25
- 80%
- 10-03
- 90%
- 10-08
Growing season length (days, 28°F threshold)
- Short year
- 99
- Median
- 137
- Long year
- 166
Source NOAA station
ALTURAS MUNI AP, CA US
10.6 mi · 30 yrs of record (1991–2020) · 4375 ft elev.
Data from ALTURAS MUNI AP, CA US, 10.6 miles away with 30-year NOAA record (1991-2020).
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